13668523 has 12 divisors (see below), whose sum is σ = 15216264. Its totient is φ = 12267200.

The previous prime is 13668521. The next prime is 13668547. The reversal of 13668523 is 32586631.

It is not a de Polignac number, because 13668523 - 2¹ = 13668521 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13668521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9363 + ... + 10723.

It is an arithmetic number, because the mean of its divisors is an integer number (1268022).

Almost surely, 2^13668523 is an apocalyptic number.

13668523 is a deficient number, since it is larger than the sum of its proper divisors (1547741).

13668523 is a wasteful number, since it uses less digits than its factorization.

13668523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1466 (or 1455 counting only the distinct ones).

The product of its digits is 25920, while the sum is 34.

The square root of 13668523 is about 3697.0965635212. The cubic root of 13668523 is about 239.0968544731.

It can be divided in two parts, 1366 and 8523, that added together give a palindrome (9889).

The spelling of 13668523 in words is "thirteen million, six hundred sixty-eight thousand, five hundred twenty-three".